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If you currently use IEEE 802.1x authentication on Windows XP Service Pack 1 and do not use WPA encryption, Lenovo recommends you uninstall Q826942 (WPA Supplicant update rollup package in Windows XP) and Q815485 (WPA Wireless Security Update in Windows XP). This does not apply if you are running Windows XP Service Pack 2.

To check if Q826942 or Q815485 is installed and to uninstall it:

Start Windows XP and logon with administrative privileges.

Click Start and then click Control Panel.

Click Add or Remove Programs.

Click Windows XP Hotfix (SP2) Q826942 or Windows XP Hotfix (SP2) Q815485 if it is listed under Currently installed programs.

Click Remove and follow the instructions on the screen.Note:The above action will remove all the fixes within the update rollup package, Q826942. You may need to re-install the other specific hotfixes you expect for this rollup package.

If you use Windows 2000, please stop the Microsoft Wireless Configuration service if it is already installed.

To check if the service is installed and to stop it:

Start Windows 2000 and logon with administrative privileges.

Click Start, select Settings, and then click Control Panel.

Double-click Administrative Tools then Services.

Double-click Wireless Configuration if it is listed.

Change Startup type to Disabled if it is not.

Click OK.

You may need to re-enter security information after updating the Wireless LAN driver.

(Fix) The computer may fail to connect with wireless network after resuming normal operation from standby or hibernation mode in the battery mode.

(Fix) The computer disconnects wireless connection after 3D screen saver started.Note: Known issues and solutions are:Wireless connection speed may be limited to 54 Mbps when WPA / WPA2 mix mode is selected at Access Point. To resolve this issue, open the setup menu of Access Point, and select "WPA2 only" (or similar) as the security mode.